EXCLUSIVE: The Mandalorian, Twisters and Mission: Impossible – Final Reckoning action star Katy O’Brian has written a book about the discipline that gets her into character, and that’s Girl at the Gym: A Beginner’s Guide to Strength Training and Becoming Your Most Badass Self.

Source: [Deadline](https://deadline.com/2026/11/katy-obrian-book-girl-at-the-gym-1237219353/)

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